Stove-grate.



No. 703,455. Patented lul y' I, I902.

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STOVE GRATE.

(Application filed Jam 9, 1901.)

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UNITED STAT S.

THOMAS PARTRIDGE, .na,

PATENT OFFICE.

OF HAMILTON, CANADA.

STOVE-G RATE.

SPECIFICATION formingpart of Letters Patent No. 703,455, dated July 1902- Applioation filed January 9, 1901. Serial No. 42,681. (No model.)

T0 at whom it may concern.-

Be it known that I, THOMAS PARTRIDGE, Jr., a citizen of the Dominion of Canada, residing at the city of Hamilton, in the county of VVentWorth, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Stove-Grates; and I-do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same.

My invention relates to improvements in stove-grates, in which a horizontal bar carrying a series of eccentrics or cams are made to agitate a series of grate-bars, formed to oscillate in four movements, journaled in a single frame. The grate-bars are formed specially for burning to advantage different kinds of coalsuch as souris, lignite, anthracite, bituminous, and screenings-and also all kinds of wood and charcoal. The grate-bars are constructed short and in such a manner that they.

are strong and durable and will not warp,

and the cam action in operating them is such that the motion is equalized in agitating the fire from end to end Without any loss of fuel. For use with fine coal I sometimes make the grate-bars double, one bar being above theeach one, and when the cam bar or red ispartially turned each grate-bar oscillates that is, rises on one side and descends on the other, besides oscillating from end to end. Thus any desired amount of air-space may be obtained to admit oxygen to the fire and increase the draft,while at the same time if the fire-chamber of a stove requires to be emptied the grate-bars can be turned vertically, leaving a large enough space between them for the whole contents of the fire-chamberviz., ashes, cinders, &c.to be dumped into the ash-pan whenthe fire-chamber requires cleaning out. I attain these objects by the mechanism illustrated in the accompanying drawings,in 'hlcll e- Figure 1 is a plan view of the grate-frame only. 1 Fig. 2 is a side view of the same. Fig. 3 is a plan of the frame with the grate-bars attached. Fig. 4 is a side elevation of the parts together. Fig. 5 is a side. and top View of one of the single grate-bars detached. Fig. 6 is an end view of the cam or eccentric rod. Fig. 7 is an end View of the series of gratebars detached from the frame and one side of each elevated and the other depressed by the action of the cams on the cam-rod. Fig. Sis alongitudinal view showing the frame in section, the cam'rod and double grates in horizontal or normal position when not acted upon by the cams. Fig. 9 is a crosssection of the frame with double grate journaled therein.

Fig. 10 is a side and end View of a double gratebar made in one piece. Fig. 11 is a plan of the same. Fig. 12 is a side view of the top bar detached. Fig-13 is a top edge view of the same.

Fig. 14 is a side-view of the top of the socketbearing detached for the cam-rod bearing. Fig. 15is.an end view of the top and bottom sections of the socket-bearin g for the cam-rod.

out the several views.

B, Fig. 1, represents a rectangular frame which has provided a series of grate-bar circular-shaped journal-openings b on one side of the said frame and elongated grate journal-openings b, formed on-the opposite side to admit the journals of the grate-bars from the top and made to rest onth'e'ir'curved bottom and retained in their normal position by a bar L, in which is cut'as many half-circular openings or on the lower side as; there are grate-bar journals to be held in place.

The grate-bars C have their journals cl placed first in the openings 1) on one side of the frame B, then dropped, respectively, into the opposite openings 1), and when all are in place the strip or bar L is laid against the side of the frame and secured thereto by two screws 0 0, thereby holding all the grate-bars in a horizonal position, in which they can be readily operated upon by the cam-rod D. The hold-bar L is provided at its rear side with a series of downward projections it, that are in contact with the journals of the gratebars to give them a greater bearing-surface on the upper side. The lower edges of these projections are made convex to allow a little play of the journals. On one side of the said frame B is cast a half-circular projection M to act as a bearing for the cam-rod D at one end and the opposite end being inserted in an opening m in the frame and journal 01 of the frame. The socket M on the left side has a fiat projection 0 on each side to receive the corresponding upper half M (see Fig. 14) of the socket, which is placed on the top of the lower half and both secured together by the screws 1) p, as shown at Fig. 3. The upper half M of the socket is provided with an upward projection g, which when the said halfsocket is in its place fills up the space 1' or opening in the frame B. The said grate-bars C may have their air or draft openings formed in rows of circular holes, as e e a, Fig. 3, or as longitudinal openings 6, as shown at Figs. 10 and 11, according to the kind of coal desired to be consumed in the stove, the finer the coal the smaller the openings and the coarser the coal the larger the openings.

It will be observed that the grate-bars O are all operated simultaneously by means of the cam-rod D, to which cams or eccentrics f are attached, as shown at Figs. 3, 4, and 7, and move up and down, alternately impinging on a curved projection g (see Figs. 5 and 7) and cause a rocking side motion of the grate-bars C and a back-and-forth end motion at the same time, making thus four movements in shaking the grate by oscillating the cam-rod D with the crank-handle E, which is formed with a square opening at one end, so as to engage properly with the corresponding projection on the end of the cam-rod D to shake the grate-bars, which are made to assume the position shown at Fig. '7 and the reverse of the same to allow the ashes and cinders to drop between them to the ash-pit. By pushing the handle in farther, so that the projection s on the open end of the said handle E engages with a notch 25 on the end ofthe socket M M, the entire grate and frame can be dumped or turned upside down to clean the fire-box of all ashes, cinders, the.

I am aware that a grate-fra me has been pivotally mounted on tubular trunnions at each end and supporting a plurality of grate-bars hinged to the frame and a plurality of fingers to work in the spaces between the bars, and I do not claim this construction; but

What I do claim, and desire to secure by Letters Patent, is

1. In a grate, a frame constructed with ovalshaped grate-journal-bearing openings on one side, and a series of vertical notches open at the top on the opposite side, for bearings for the grate-bars, the frame also constructed with a circular socket at one end and a longitudinal bearing on the opposite side to receive a cam-rod to operate the grate-bars, and a hold-bar provided with half-circular openings at its base edge and projections on its .rear side in contact with the said journals, the said bar being detachably secured to one side of the frame to hold the bearings of the gratebars in their normal or horizontal position, substantially as specified.

2. A series of journaled double grate-bars, each consisting of an upper bar and a lower bar made integral and provided with openings, in combination with a frame having bearings for the journals of said grate-bars, means for holding them therein and a rockshaft journaled in said frame and having cams arranged to act on said bars substantially as set forth.

3. In a grate, the combination of a frame constructed with grate-journal openings on its opposite sides, and a series of grate-bars having their journals pivoted therein, a camrod journaled in the frame under the gratebars having a series of double cams made to impinge alternately against and oscillate the grate-bars, and a side bar provided with notches to fit over the journals of the grates to hold them in position, attached to the frame, substantially as and for the purpose specified.

4. In a grate, a grate-frame provided with a notch, a circular opening in one end and a projecting lug on the other end recessed to form a bearing, grate-bars, a cam-shaft adapted to oscillate the grate-bars one end of which rests in the said opening and the other end in the said bearing, a bar similarly recessed and adapted to form the upper half of said bearing, one end of said bar extending inwardly and engaging the notch in said grate-frame, the other end of said bar carrying a projecting lug, a crank for oscillating the cam-shaft and having a lug in its socket adapted to engage the projecting lug on the said bar whereby the grate-frame may be dumped.

Dated at Hamilton, Ontario, Canada, the 17th day of December, 1900.

- THOS. PARTRIDGE, JR. In presence of- ERNEST M. LEVITT, WM. BRUCE. 

